CD99

CD99
Identifiers
Aliases	CD99, HBA71, MIC2, MIC2X, MIC2Y, MSK5X, CD99 molecule, CD99 molecule (Xg blood group)
External IDs	OMIM: 313470, 450000; HomoloGene: 48107; GeneCards: CD99; OMA:CD99 - orthologs
Gene location (Human)
Chr.	X chromosome (human)
End	2,741,309 bp
RNA expression pattern
	Top expressed in
	beta cell; ; thymus; ; synovial joint; ; stromal cell of endometrium; ; olfactory bulb; ; tendon of biceps brachii; ; synovial membrane; ; right coronary artery; ; vena cava; ; tibial nerve;
	n/a
	More reference expression data
	; ;
	More reference expression data
Gene ontology
Molecular function	protein binding;
Cellular component	cytoplasm; integral component of membrane; plasma membrane; integral component of plasma membrane; membrane; focal adhesion;
Biological process	cell adhesion; regulation of immune response; homotypic cell-cell adhesion; T cell extravasation; positive regulation of neutrophil extravasation;
	Sources:Amigo / QuickGO
Orthologs
	4267
	n/a
	ENSG00000002586
	n/a
	P14209
	n/a
NM_001122898; NM_001277710; NM_002414; NM_001321367; NM_001321368;
	NM_001321369; NM_001321370
	n/a
NP_001116370; NP_001308296; NP_001308297; NP_001308298; NP_001308299;
	NP_002405
	n/a
	Wikidata
View/Edit Human

CD99 antigen (Cluster of differentiation 99), also known as MIC2 or single-chain type-1 glycoprotein, is a heavily O-glycosylated transmembrane protein that is encoded by the CD99 gene in humans. The protein has a mass of 32 kD. Unusually for a gene present on the X chromosome, the CD99 gene does not undergo X inactivation, and it was the first such pseudoautosomal gene to be discovered in humans.